The 12 - 28 metre wide asteroid 2015 ET made a close pass (0.3 LD, 0.0008 AU) travelling at 12.38 km/second, to the Earth-Moon system on the 10th March 2015 @ 16:42 UT ±00:01.
Orbital elements:
2015 ET Earth MOID = 0.0008 AU
Epoch 2015 June 27.0 TT = JDT 2457200.5 MPC
M 49.11767 (2000.0) P Q
n 0.33960826 Peri. 124.22154 -0.47562239 -0.87964892
a 2.0346227 Node 354.17804 +0.80358604 -0.43400462
e 0.5786433 Incl. 0.59886 +0.35781674 -0.19457073
P 2.90 H 26.6 G 0.15 U 5